The Sword Venerable exhausted his cultivation to quell the chaos caused by the demonic cultivators. His meridians were shattered, his natal sword was completely destroyed, and he became a cripple who could never wield a sword again.
Before the Demon Venerable died, he left behind a little girl. The girl's talent was extraordinary, but the Demon Venerable had trained her into a living weapon. Her hands were stained with blood, and if you took your eyes off her for a moment, she'd cut someone's arm off.
The little girl stared with hollow eyes, scorching blood splattered across her young face.
Some people shrieked that the child must not be allowed to live. Others argued that she was only a little one, and killing her might bring down heaven's wrath. In the end, after a year of twists and turns, they sent her to the Sword Venerable, now a cripple.
Sword Venerable: "Wait, I've already resigned myself to lying flat and waiting to die. Why are you sending me a troublesome little brat?"
He meant to refuse, but then he saw how covered in wounds the troublesome little one was.
Sword Venerable: "...Fine."
A Sword Venerable with a healthy attitude who accepts being a cripple x a single-minded little genius with overwhelming combat prowess
Theme: People are inherently good